210013200121 has 2 divisors, whose sum is σ = 210013200122. Its totient is φ = 210013200120.

The previous prime is 210013200119. The next prime is 210013200127. The reversal of 210013200121 is 121002310012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184844964096 + 25168236025 = 429936^2 + 158645^2 .

It is a cyclic number.

It is not a de Polignac number, because 210013200121 - 2¹ = 210013200119 is a prime.

Together with 210013200119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (210013200127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006600060 + 105006600061.

It is an arithmetic number, because the mean of its divisors is an integer number (105006600061).

Almost surely, 2^210013200121 is an apocalyptic number.

It is an amenable number.

210013200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210013200121 is an equidigital number, since it uses as much as digits as its factorization.

210013200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210013200121 its reverse (121002310012), we get a palindrome (331015510133).

The spelling of 210013200121 in words is "two hundred ten billion, thirteen million, two hundred thousand, one hundred twenty-one".